HIM is a mysterious, super-powerful, red-skinned, and possibly effeminate demon. He has large lobster-like claws, pointed ears, black widow's peak hair, yellow-green eyes, a hooked nose and a long, curled beard. He wears makeup, with three long eyelashes on each eyelid, rosy red cheeks and black lipstick. A lady's red jacket and skirt with pink tulle at the collar and hemline, and black, thigh-high, spike-heeled boots (hooker boots) complete the oddly feminine look. It is implied that he may be the devil himself in The Powerpuff Girls series and the crossover from The Amazing World of Gumball the series or the movie, as he is said to be "so sinister, so evil, so horribly vile that his real name can never be said".

So HIM decides to find its own purpose in life, and carry out its revenge on Nicole by destroying.